On the family tree featured in the film, her first name is misspelt "Cassiapeia".

Etymology

Like many members of the House of Black, Cassiopeia is named after a constellation. The constellation is in turn named after Queen Cassiopeia of Greek mythology, a beautiful but vain woman whose arrogant boasting led to her downfall. The name is derived from the Greek Κασσιόπη, meaning "she whose words excel".